Alleged Chemical Attacks, December 6, 2012
What would be the first confirmed chemical weapons attack of the Syrian conflict (if confirmed, and it's not the first allegation) was reported on December 7, 2012. It came in the form of an unsupported allegation by the opposition Local Coordination Committees of “toxic gas” being “thrown” the day before in the Damascus suburb of Daraya, site of the largest mass-killing yet in August's Daraya massacre.
It came as fears had been growing for a week over the Syrian government's alleged preparations for using Sarin nerve gas, and following statements suggesting that the United States would have to militarily intervene if the government engaged in any chemical attack. Just what the gas was, and what evidence there was for it being used is unclear. It was somehow being seen as drawing strength from credible same-day reports of the use of white phosphorous, which is not a chemical weapon. It remains to be seen whether this allegation (or the one two days later) is deemed to have crossed Washington's "red line."
The LCC Report
The Local Coordination Committees (LCC), an informed if not impartial purveyor of semi-detailed information from the front lines, made the claim in question in its daily summary "Syria Today 6-12-2012."  All information relevant to Daraya is as follows:
- 45 martyrs were reported in Damascus and its Suburbs...
- The LCC documented 248 points of shelling, 13 points were shelled by warplane (the fiercest was in Damascus Suburbs), 2 points were shelled by Cluster Bombs and 4 points by barrel bombs. The regime forces shelled Mohasan and Buomar by Phosphorous Bombs and threw toxic gases in Daraya.
- The FSA clashed with regime forces in 107 points ... FSA blocked several attempts by the regime forces to storm Haran Awameed, Zamalka and several towns of Eastern Ghouta, it also blocked attempts in Daraya ...
- A video is shown, labeled "Aftermath of Missile Shelling in Daraya, Damascus Suburbs."
None of this gives any details or support for the free-floating claim of toxic gasses. It could be nothing more than a strange translation error or typo.
The parallel opposition Syrian Observatory for Human Rights (SOHR) has a daily report for December 6 that also contains no supporting evidence, nor even any similar claim.  There is no mentions on the whole page of Daraya (any spelling), or the words "gas," "toxic," or "poison." It even has the following rundown of the area including Daraya in which the LCC's claim is not mentioned, although there are clearly missing words:
- Reef Dimashq: 22 rebels killed. 7 were killed by clashes over the. 12 were killed by clashes in Douma, Beit Sahm, al-Thiyabiya, Medeira and the Eastern Ghouta. 3 were killed by the bombardment on Douma
The Video Record
However much evidence there is or isn't for this LCC claim of a Daraya gas attack, it seemed to make total sense jammed as it was after talk of white phosphorous used to the east. "The regime forces shelled Mohasan and Buomar by Phosphorous Bombs," apparently near Deir Ezzor,the largest city in Syria's desert east. This allegation seems to be true; the LCC provide three videos to support the claims.
- Warplanes Equipped with Phosphorus Bombs Flying Over Mohasan, Deir Ezzor: A helicopter flying. No proof of claim.
- The Moment Phosphorus Bombs Landed in Mohasan, Deir Ezzor: White smoke spreading in a mid-distance orchard. Faint jet sounds are heard near the end, but no proof what the smoke is or that it was from a dropped bomb.
- Regime Helicopters Fire Phosphorus Bombs on Mariyeh, Deir Ezzor: Here's the pudding with the proof (barring video fakery, however likely one might find that).
In Mariyeh, it seems, someone flying a helicopter (usually government forces, to put it softly) fired white phosphorous on December 6. Reflecting this back on the previous two videos, the claims made about the same in Hohassen become more credible, if not as clearly proven.
As the December 8 allegation would be, the baseless charge was quickly and eagerly picked up by Israeli media, mainly the Times of Israel, which reported:
- As fears grow that Syrian President Bashar Assad may use chemical weapons in a desperate move to quell a 22-month uprising, members of the opposition claimed Friday that the regime is already using internationally-banned chemical agents in the war.
- The Local Coordination Committees, an opposition group active inside Syria, reported that on Thursday the military “threw toxic gases” in Daraya, southwest of Damascus, and attacked the towns of Mohasan and Buomar with phosphorus bombs. 
As supporting evidence, apparently, they also cited Captain Abdul Salam Abdul Razaq, a self-described defector "from Syria’s chemical warfare unit" told Saudi paper A-Sharq Al-Awsat that chemical agents were already used several times in the war. These alleged gassings, which seem to have left behind little or no credible evidence, were "primarily" done with two agents: mustard gas, and sarin.
- He said that since the colorless, odorless sarin gas evaporates within half an hour, the Syrian army uses it “before entering any area.” Abdul Razaq also pleaded for international assistance in taking control of chemical weapon sites, which he claimed defectors have accurate intelligence about.
A senior opposition member also told the paper Assad had planned to use chemical weapons in Damascus, but then didn't. 
- Syria Today 6-12-2012 Local Coordination Committees. Posted by abeer on December 7th, 2012
- Approximately 83 Syrians have been killed yesterday (December 6) SOHR, Dec. 7, 2012
- Assad is already using chemical weapons, Syrian opposition claims Elhanan Miller, Times of Israel, December 7, 2012